A new system based on old technology may allow for chemical-free CO2-scrubbing onboard submarines

Dixon rings

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Submarine crews could be breathing much healthier air thanks to miniscule devices based on 62 year-old technology. Currently, carbon dioxide is removed from the air in submarines through a reaction with chemicals such as calcium hydroxide. Chemical engineers from England’s University of Bath are collaborating with mechanical engineers from Duke University in the US, to develop a chemical-free filtration system. It utilizes seawater and tiny folded wire mesh rings known as Dixon rings.